BUG: PUT /api/v1/darkube/apps/:id non-idempotent — wipes unset fields

[erfanium]

Problem

The Hamravesh API's PUT endpoint for app updates replaces the entire resource, not just the fields sent. Sending a partial payload silently drops fields not included:

# Only updating the disk config
curl -X PUT .../apps/xxx/ -d '{disk: {...}}'

# Result: custom_subdomain_addr → null, enable_SSL → false, plan → changed

During a single deployment session, subdomain was wiped 3 times accidentally.

Workaround

Always include custom_subdomain_addr, enable_SSL, disk, envs, and command in every PUT — effectively GET-first, then PUT with all fields merged.

Expected

Either:

• PATCH endpoint for partial updates, or
• PUT only overwrites fields actually present in the payload